Exemple #1
1
 void start() {
   if (t == null) {
     t = new Thread(this, "UDP.OutgoingPacketHandler thread");
     t.setDaemon(true);
     t.start();
   }
 }
Exemple #2
0
    /**
     * @param views Guaranteed to be non-null and to have >= 2 members, or else this thread would
     *     not be started
     */
    public synchronized void start(Map<Address, View> views) {
      if (thread == null || thread.isAlive()) {
        this.coords.clear();

        // now remove all members which don't have us in their view, so RPCs won't block (e.g.
        // FLUSH)
        // https://jira.jboss.org/browse/JGRP-1061
        sanitizeViews(views);

        // Add all different coordinators of the views into the hashmap and sets their members:
        Collection<Address> coordinators = Util.determineMergeCoords(views);
        for (Address coord : coordinators) {
          View view = views.get(coord);
          if (view != null) this.coords.put(coord, new ArrayList<Address>(view.getMembers()));
        }

        // For the merge participants which are not coordinator, we simply add them, and the
        // associated
        // membership list consists only of themselves
        Collection<Address> merge_participants = Util.determineMergeParticipants(views);
        merge_participants.removeAll(coordinators);
        for (Address merge_participant : merge_participants) {
          Collection<Address> tmp = new ArrayList<Address>();
          tmp.add(merge_participant);
          coords.putIfAbsent(merge_participant, tmp);
        }

        thread = gms.getThreadFactory().newThread(this, "MergeTask");
        thread.setDaemon(true);
        thread.start();
      }
    }
Exemple #3
0
 public void start() {
   if (thread == null) {
     thread = new Thread(this, "UDP.UcastReceiverThread");
     thread.setDaemon(true);
     running = true;
     thread.start();
   }
 }
Exemple #4
0
 synchronized void start() {
   if (queue.closed()) queue.reset();
   if (thread == null || !thread.isAlive()) {
     thread = getThreadFactory().newThread(this, "ViewHandler");
     thread.setDaemon(
         false); // thread cannot terminate if we have tasks left, e.g. when we as coord leave
     thread.start();
   }
 }
Exemple #5
0
  /**
   * Creates a table and fills it to capacity. Then starts a number of adder threads, each trying to
   * add a seqno, blocking until there is more space. Each adder will block until the remover
   * removes elements, so the adder threads get unblocked and can then add their elements to the
   * buffer.
   */
  public void testConcurrentAddAndRemove() throws Exception {
    final int NUM = 5;
    final Table<Integer> buf = new Table<Integer>(3, 10, 0);
    for (int i = 1; i <= 10; i++) buf.add(i, i); // fill the buffer, add() will block now

    CountDownLatch latch = new CountDownLatch(1);
    Adder[] adders = new Adder[NUM];
    for (int i = 0; i < adders.length; i++) {
      adders[i] = new Adder(latch, i + 11, buf);
      adders[i].start();
    }

    System.out.println("releasing threads");
    latch.countDown();
    System.out.print("waiting for threads to be done: ");

    Thread remover =
        new Thread("Remover") {
          public void run() {
            Util.sleep(2000);
            List<Integer> list = buf.removeMany(true, 5);
            System.out.println("\nremover: removed = " + list);
          }
        };
    remover.start();

    for (Adder adder : adders) {
      try {
        adder.join();
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
    }

    remover.join();

    System.out.println("OK");
    System.out.println("buf = " + buf);
    assert buf.size() == 10;
    assertIndices(buf, 5, 5, 15);

    List<Integer> list = buf.removeMany(true, 0);
    System.out.println("removed = " + list);
    assert list.size() == 10;
    for (int i = 6; i <= 15; i++) assert list.contains(i);
    assertIndices(buf, 15, 15, 15);
  }
Exemple #6
0
  /** Starts the unicast and multicast receiver threads */
  void startThreads() throws Exception {
    if (ucast_receiver == null) {
      // start the listener thread of the ucast_recv_sock
      ucast_receiver = new UcastReceiver();
      ucast_receiver.start();
      if (Trace.trace) {
        Trace.info("UDP.startThreads()", "created unicast receiver thread");
      }
    }

    if (ip_mcast) {
      if (mcast_receiver != null) {
        if (mcast_receiver.isAlive()) {
          if (Trace.trace) {
            Trace.info(
                "UDP.createThreads()",
                "did not create new multicastreceiver thread as existing "
                    + "multicast receiver thread is still running");
          }
        } else {
          mcast_receiver = null; // will be created just below...
        }
      }

      if (mcast_receiver == null) {
        mcast_receiver = new Thread(this, "UDP mcast receiver");
        mcast_receiver.setPriority(Thread.MAX_PRIORITY); // needed ????
        mcast_receiver.setDaemon(true);
        mcast_receiver.start();
      }
    }
    if (use_outgoing_packet_handler) {
      outgoing_packet_handler.start();
    }
    if (use_incoming_packet_handler) {
      incoming_packet_handler.start();
    }
  }